#coding=utf-8
#!/usr/bin/env python

def binarySearch( list,item ):
	low=0

	high=len(list)-1
	print "high %d" % high

	while low<=high:
		mid = (low+high)/2
		guess = list[mid]
		print "guess= %d" % guess
		if guess==item:
			return mid
		if guess>item:
			high = mid -1;
		else:
			low=mid+1
	return None

my_List=[1,3,5,7,9]

print binarySearch( my_List,3 )
print binarySearch( my_List,6 )